French philosopher and littérateur, born in Paris in January 1715. He was descended from a family of physicians, whose original name was Schweitzer (latinized as Helvetius). His grandfather introduced the use of ipecacuanha; his father was first physician to Queen Marie Leszczynska of France. Claude Adrien was trained for a financial career, but he occupied his spare time with writing verses. At the age of twenty-three, at the queen's request, he was appointed farmer-general, a post of great responsibility and dignity worth a 100,000 crowns a year. Thus provided for, he proceeded to enjoy life to the utmost, with he help of his wealth and liberality, his literary and artistic tastes. As he grew older, however, his social successes ceased, and he began to dream of more lasting distinctions, stimulated by the success of Maupertuis as a mathematician, of Voltaire as a poet, of Montesquieu as a philosopher. The mathematical dream seems to have produced nothing; his poetical ambitions resulted in the poem called Le Bonheur (published posthumously, with an account of Helvétius's life and works, in 1773), in which he develops the idea that true happiness only to be found in making the interest of one that of all; his philosophical studies ended in the production of his famous book De l'Esprit. It was characteristic of the man that, as soon as he thought his fortune sufficient, he gave up his post of farmer-general, and retired to an estate in the country, where he employed his large means in the relief of the poor, the encouragement of agriculture and the development of industries. De l'Esprit, intended to be the rival of Montesquieu's L'Esprit des lois, appeared in 1758. It attracted immediate attention and aroused the most formidable opposition, especially from the dauphin, son of Louis XV. The Sorbonne condemned the book, the priests persuaded the court that it was full of the most dangerous doctrines, and the author, terrified at the storm he had raised, wrote three separate retractations; yet, in spite of his protestations of orthodoxy, he had to give up his office at the court, and the book was publicly burned by the hangman. The virulence of the attacks upon the work, as much as its intrinsic merit, caused it to be widely read; it was translated into almost all the languages of Europe. Voltaire said that it was full of commonplaces, and that what was original was false or problematical; Rousseau declared that the very benevolence of the author gave the lie to his principles; Grimm thought that all the ideas in the book were borrowed from Diderot; according to Madame du Deffand, Helvétius had raised such a storm by saying openly what every one thought in secret; Madame de Graffigny averred that all the good things in the book had been picked up in her own salon. In 1764 Helvétius visited England, and the next year, on the invitation of Frederick II, he went to Berlin, where the king paid him marked attention. He then returned to his country estate and passed the remainder of his life in perfect tranquillity. He died on the 26th of December 1771.

His philosophy belongs to the utilitarian school. The four discussions of which his book consists have been thus summed up: (1) All man's faculties may be reduced to physical sensation, even memory, comparison, judgment; our only difference from the lower animals lies in our external organization. (2) Self-interest, founded on the love of pleasure and the fear of pain, is the sole spring of judgment, action, affection; self-sacrifice is prompted by the fact that the sensation of pleasure outweighs the accompanying pain; it is thus the result of deliberate calculation; we have no liberty of choice between good and evil; there is no such thing as absolute right -- ideas of justice and injustice change according to customs. (3) All intellects are equal; their apparent inequalities do not depend on a more or less perfect organization, but have their cause in the unequal desire for instruction, and this desire springs from passions, of which all men commonly well organized are susceptible to the same degree; and we can, therefore, all love glory with the same enthusiasm and we owe all to education. (4) In this discourse the author treats of the ideas which are attached to such words as genius, imagination, talent, taste, good sense, etc. The only original ideas in his system are those of the natural equality of intelligences and the omnipotence of education, neither of which, however, is generally accepted, though both were prominent in the system of John Stuart Mill. There is no doubt that his thinking was unsystematic; but many of his critics have entirely misrepresented him (e.g. Cairns in his Unbelief in the Eighteenth Century}. As J. M. Robertson (Short History of Free Thought) points out, he had great influence upon Jeremy Bentham, and C. Beccaria states that he himself was largely inspired by Helvétius in his attempt to modify penal laws. The keynote of his thought was that public ethics has a utilitarian basis, and he insisted strongly on the importance of culture in national development.